A Hong Kong court has dropped a charge against the former financial chief of Jimmy Lai Chee-ying’s flagship media company after he testified for the prosecution against his former employer in a fraud trial.The ruling came after the Court of Appeal last week quashed Lai’s fraud conviction for operating a consultancy office out of his now-defunct tabloid newspaper, Apple Daily, finding that the prosecution had failed to prove that the media mogul had made a “false representation” or was...